Valve



AU8- 16, 1932- E. J. LATTNER 1,871,535

VALVE Filed Aug. l5. 1930 Patented Aug. 16, 1932 PATENT OFFICE EMERT J'.LATTNEB, 0F CEDAR RAPIDS, IOWA VALVE Application filed August 15, 1930.Serial N0. 475,404.

This invention relates to a Huid pressure equalizing valve member andmore partlcularly to valve members for the regulation of the flow ofliquid fuel to a burner, especially an oil burner of the pressureatomlzing type.

An object of the invention is to produce a valve member which regulatesand maintams a predetermined pump pressure and controls the iow of fluidto a nozzle or other device within predetermined limits.

A further object is to produce a valve member which will maintain aconstant pressure over a period of time even though the pump should wearand lose its normal pumping capacity, or, in other words, so long .asthe pump has a capacity equal to the orllice or nozzle capacity.

A further object is to produce a valve member which permits theobtaining of both the above mentioned objects by a readily accessiblesingle adjustment means which duly controls the opening pressure and thebypass pressure.

A further object is to construct a valve member of such design that anysediment collectedwill settle in a portion of the device where it willnot hinder operation and which may be easily cleaned or flushed byentrance through an aperture normally closed by means of a plug.

Other and further objects and features of novelty will be apparent fromthe following specification when read in connection with theaccompanying drawing in which one em:

bodiment is illustrated by In the drawing:

Figure 1 is a section view through the center of the valve;

Figure 2 is a section view of the base portion of the valve takenthrough the center at ight angles to the view shown in Fig. 1; an

way of example.

Figure 3 is a top plan view of the base portion as it appears afterremoval of the cap portion and the diaphragm.

Referring to the drawing in detail, the valve is preferably cylindricaland is com posed essentially of a base portion 1, a cap portion A2 and adiaphragm 3, each hereinafter further described.

Thebase ortion is constructed with five ports 4, 5, 6, and 8, all ofwhich are threaded at their outer ends as indicated by numerals 9 to 13.Inlet port 4 is adapted for connection to the high pressure side of apump or other fluid delivery device (not shown) and communicates with adeep annular groove 14 situated in the face of said base portion asindicated at 15.

A pressure gauge (not shown) is attached 6 connection to a nozzle orother fluid outlet and communicates at its inner end in two smallorifices 17 with the small annular groove 19 concentric with respect togroove 14 and also in the face of the base portion 1.

Port 7 is a by-pass port situated opposite outlet port 6 whereby fluidunder excess pressure may be led to the low pressure side of theaforementioned pump, in a manner later to be described. rIhis portcommunicates with the face of the base section 1 substantially at thecenter and within the annular grooves 14 and 19.

Port 8 communicates with port 7 as illustrated and is provided with aremovable plug 20 The base portion l is provided with a mounting bracket21 with slots 22. It is obvious that other means may be provided forsupporting the device, and that the disj closed means may be anextension from the cap 2 rather than from the base portion 1.

The cap portion 2 comprises a cylindrical casing 23 having an annularflange 24 adapted to be attached to the base portion 1 by means o fseveral machine screws 25. Vithin 9 the caslng,

there is a compression spring, preferably of steel, supported betweentwo cylindrical buttons 27 and 28, preferably of brass, adapted forvertical movement within the cap 2. Cap 28 is slightly rounded at itsbottom face as at 29 and yieldingly rests upon the diaphragm 3. Likewisethe inside edge of said annular flange 24 is rounded as at 30.

Above said button 27 and in contact therewith is a pressure adjustingscrew 31 threaded into the top of the casing 2. An acorn nut 32 isprovided to cover the screw 31.

The flexible diaphra in 3 is situated between the base 1 and t e cap 2and is held against the face of base 1 b means of the screws 25. It iscomposed o an upper sheet preferably of metal such as phosphor bronzeand a lower sheet of a resilient composition which is impervious orsubstantially impervious to the fluid passing through the valve.

It should be noted that the diaphragm 3 is a single valve member servingto control flow of liuid through cach of the ports 4, 6 and 7 and thatthe rim portions of the grooves 14 and 19 at the face of the base 1 andthe inlet end of the port 7 each serve as valve seats.

When the valve is in operation as in an oil line leading to a nozzle inan oil burner, the oil is forced by means of a pump into the inlet port4 and passes through the orifice or opening 15 into annular groove 14.The fluid pressure is indicated by a pressure gauge inserted in port 5in communication with roove 14. When the pressure reaches apredetermined amount, the diaphragm is lifted to a certain extent b ltheoil which passes over the inside rim o groove 14 into groove 19 fromwhence it travels through port 6 to the nozzle. If the pressure is inexcess of that desired, a portion of the oil will pass over the insiderim of groove 19 into the bypass port 7 and finally back to the inletside of the pump or to the storage tank. In this manner a constantpressure isautomatically maintained at the nozzle.

Within the pressure range of the pump, any pressure can be obtained atthe nozzle by merely adjusting the force of the diaphragm against theface of the base portion 1 by means of adjustment screw 31.

Having thus described the invention, what is claimed as -new andddesiredto be secured by Letters Patent is:

1. In a fluid pressure regulating valve having inlet, outlet and by-passports, valve seats associated with said outlet and by-p-ass ports, aiexible diaphragm constituting a valve member so situated with respectto said ports as to permit flow from said inlet port to said outlet portonly while said incoming fluid is at a pressure above a predeterminedamount and to permit flow through said by-pass port only while excesspressure conditions prevail, and adjustable spring means for yieldinglyholding said diaphragm against said seats.

2. In a fluid pressure regulatin valve, inl combination, a base portioninc uding an inlet passage communicating with an annular groove in saidbase portion, an outlet passage communicating with a second annulargroove concentrically disposed with respect to said first mentionedgroove and a by-pass passage having its inlet end positioned within saidannular grooves, and a iexible diaphragm yieldingly positioned againstthe face of said grooves and said inlet end of said by-pass passage.

53. valve according to claim 2 in which said diaphragm is composed oftwo sheets, one of a metallic nature and the other of a resilientnature.

4. A valve according to claim 2 wherein in eans is provided foryieldingly holding said diaphragm -against said grooves and said inletend of said by-pass passage.

5. A valve according to claim 2 wherein an adjustable compression sprinmeans -is provided for holding said diap ragni against said grooves andsaid by-pass passa A fluid pressure regulating vaIiie comprising a baseportion including inlet, outlet and by-pass ports opening therein, aflexible diaphragm, and a cap ortion enclosin adjustable means to yielngly press sai diaphragm against said ports.

7. A fluid pressure regulating valve, comprising a cylindrical basertion having an inlet and an outlet port in communication with groovesin a face of said base portion and a by-pass port also opening into saidface of said base portion, a iexible diaphragm and a cap member adaptedto yield- `ingly hold said diaphragm against said grooves and saidby-pass port.

8. A fluid pressure regulating valve, coinprising a base portion avingin its upper face two annular concentric grooves and the inner end of aby-pass port, an inlet port in communication with said outer groove andan outlet port in communication with said inner groove, a flexiblediaphragm and a cap portion adapted for attachment tol said base portionand to hold said diaphragm against the said upper face of said baseportion.

i?. A fiuid pressure re lating valve, comprising a base portion aving inits upper ace an annular groove in communication with an inlet port, asecond annular groove within said first mentioned groove incommunication with an outlet port, of less capacity than said firstmentioned groove, and the inlet end of a by-pass port a exible diaphragmincluding a sheet of resilient material and a cap portion so positionedas to yieldingly hold said diaphragm against said grooves and saidby-pass port. v

10. A valve according to claim 9 wherein said cap portion includes anadjustable compression spring. y

11. A fluid pressure regulating valve, coinprising a base portion anupper cap portion and a diaphragm therebetween, said base portionincluding an inlet port and a port for insertion of a pressure gaugeboth communieating with an annular groove centrally located at the topof said base portion, an outlet port communicating with a second grooveconcentrically. locate within said first groove, a by-pass portcommunicating with the top of said base portion at a point within saidannular grooves, and a cleanout` port .provided with a plug,communicating with said by-pass port, said cap portion including anannular iange adapted for securing said diaphragm and for attachment tosaid base portion, and an adjustable compression spring adapted to exertpressure on said diaphragm in a direction tending to maintain saiddiaphragm in contact with said base portion, said diaphragm including anupper flexible metallic Sheet and a lower sheet of an imperviousresilient material.

l2. In a fluid pressure regulating valve having inlet, outlet andby-pass ports, a boss formed on the base portion of said valve, saidby-pass port being disposed centrally of said boss, an annular grooveformed in said boss and adapted to surround said by-pass port, saidoutlet port opening into said groove, valve seating surfaces on saidboss surrounding said by-pass port and said groove, a ilexible diaphragmadapted to cooperate with said valve seats to close said ports, andadjustable spring means for yieldingly holding said diaphragm againstsaid seats but to allow the diaphragm to flex so as to permit flowthrough said outlet port only While the incoming fluid is at a pressureabove a predetermined amount, and to allow further flexing to permitiloW through said centrally located by-pass port beyond a furtherpredetermined pressure.

In testimony whereof I hereunto aiix my signature.

EMERT J. LATTNER.

